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Supercooling Suppression and Thermal Conductivity Enhancement of Na2HPO4 center dot 12H(2)O/Expanded Vermiculite Form-Stable Composite Phase Change Materials with Alumina for Heat Storage
Deng, Yong1; Li, Jinhong1; Deng, Yanxi1; Nian, Hongen2,3; Jiang, Hua4
2018-05-01
发表期刊ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷号6期号:5页码:6792-6801
文章类型Article
摘要In the heat storage applications, Na2HPO4 center dot 12H(2)O phase change materials (PCM) show significant defects including form instability, high supercooling degree and low thermal conductivity. Aiming at these drawbacks, the Na2HPO4 center dot 12H(2)O-alumina/eipanded vermiculite (EVM) form-stable composite phase change materials (NEA fs-CPCMs) with supercooling suppression and heat transfer enhancement were prepared. The favorable wettability of NEA fs-CPCMs was beneficial to their form-stabilization (encapsulation mass fractions above 59.7 wt %). The supercooling degree of NE5.3 was reduced to 1.4 degrees C after adding 5.3 wt % alumina as the nucleating agent (decreased by 90%). The surface effects of EVM and alumina and high wettability of PCM-alumina were responsible for the supercooling suppression of PCM. Large specific surface area of EVM could provide nucleation sites for crystallization of PCM. The surface electronegativity of alumina increased the affinity ability and diffusion rate of ions, thus effectively increasing the probability of nucleation. The heat transfer of NEA fs-CPCMs was significantly enhanced by the alumina as the thermal conductivity enhancement filler. The thermal conductivity of NE5.3 reached 0.418 W/(m K). Thermal energy storage behavior analysis indicated that the NEA fs-CPCMs showed large heat storage capacity (melting process: 97-151 J/g; solidification process: 60-89 J/g). The thermal reliability of NEA fs-CPCMs was effectively improved by coated paraffin.
关键词Phase Change Material Expanded Vermiculite Alumina Supercooling Suppression Thermal Conductivity Enhancement
WOS标题词Science & Technology ; Physical Sciences ; Technology
关键词[WOS]CALCIUM-CHLORIDE HEXAHYDRATE ; BUILDING ENERGY-CONSERVATION ; GRAPHITE COMPOSITE ; ACETATE TRIHYDRATE ; CHANGE PERFORMANCE ; PERLITE COMPOSITE ; BEHAVIOR ; SYSTEMS ; STABILIZATION ; NANOPARTICLES
收录类别SCI
语种英语
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Engineering
WOS类目Chemistry, Multidisciplinary ; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY ; Engineering, Chemical
WOS记录号WOS:000431927500121
出版者AMER CHEMICAL SOC
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6715
专题中国科学院青海盐湖研究所
通讯作者Li, Jinhong; Deng, Yanxi
作者单位1.China Univ Geosci, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Sch Mat Sci & Technol, Natl Lab Mineral Mat, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Peoples R China
3.Key Lab Salt Lake Resources Chem Qinghai Prov, Xining 810008, Peoples R China
4.Qinghai Univ, Xining 810016, Peoples R China
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Deng, Yong,Li, Jinhong,Deng, Yanxi,et al. Supercooling Suppression and Thermal Conductivity Enhancement of Na2HPO4 center dot 12H(2)O/Expanded Vermiculite Form-Stable Composite Phase Change Materials with Alumina for Heat Storage[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2018,6(5):6792-6801.
APA Deng, Yong,Li, Jinhong,Deng, Yanxi,Nian, Hongen,&Jiang, Hua.(2018).Supercooling Suppression and Thermal Conductivity Enhancement of Na2HPO4 center dot 12H(2)O/Expanded Vermiculite Form-Stable Composite Phase Change Materials with Alumina for Heat Storage.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,6(5),6792-6801.
MLA Deng, Yong,et al."Supercooling Suppression and Thermal Conductivity Enhancement of Na2HPO4 center dot 12H(2)O/Expanded Vermiculite Form-Stable Composite Phase Change Materials with Alumina for Heat Storage".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 6.5(2018):6792-6801.
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